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74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
/******************************************************************************
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*
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* Copyright 2022 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#ifndef __LC3BIN_H
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#define __LC3BIN_H
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#include <stdio.h>
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#include <stdint.h>
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#include <lc3.h>
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/**
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* Read LC3 binary header
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* fp Opened file, moved after header on return
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* frame_us Return frame duration, in us
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* srate_hz Return samplerate, in Hz
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* hrmode Return true when high-resolution mode enabled
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* nchannels Return number of channels
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* nsamples Return count of source samples by channels
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* return 0: Ok -1: Bad LC3 File
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*/
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int lc3bin_read_header(FILE *fp,
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int *frame_us, int *srate_hz, bool *hrmode,
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int *nchannels, int *nsamples);
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/**
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* Read LC3 block of data
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* fp Opened file
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* nchannels Number of channels
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* buffer Output buffer of `nchannels * LC3_HR_MAX_FRAME_BYTES`
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* return Size of the frames block, -1 on error
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*/
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int lc3bin_read_data(FILE *fp, int nchannels, void *buffer);
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/**
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* Write LC3 binary header
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* fp Opened file, moved after header on return
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* frame_us Frame duration, in us
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* srate_hz Samplerate, in Hz
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* hrmode True when high-resolution mode enabled
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* bitrate Bitrate indication of the stream, in bps
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* nchannels Number of channels
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* nsamples Count of source samples by channels
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*/
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void lc3bin_write_header(FILE *fp,
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int frame_us, int srate_hz, bool hrmode,
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int bitrate, int nchannels, int nsamples);
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/**
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* Write LC3 block of data
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* fp Opened file
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* data The frames data
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* nbytes Size of the frames block
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*/
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void lc3bin_write_data(FILE *fp, const void *data, int nbytes);
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#endif /* __LC3BIN_H */
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